First official period?

Sara • FTM • DD Nov. 24 but born Nov.19 • Happily Taken❤️

After having a baby. Guess it’s called PP period? How long does it usually last? I’m on my 3rd day and it’s pretty heavy. I was told it was going to be like that in the beginning then after time it was going to go back to normal. My regular period before getting pregnant was 3-5dsys max.